It is not normal for teeth to become transparent and yellow. 1. If the teeth look a little transparent and slightly yellowish in color, it is a normal phenomenon. However, teeth transparent yellowing obvious, generally considered to be long-term smoking, drinking strong tea or coffee and other reasons, resulting in pigment adsorption on the surface of the teeth, and the normal appearance of the teeth, color and shade is not the same. 2. If there are tetracycline teeth, dental fluorosis, etc., there will also be transparent yellowing of the teeth, which is also abnormal, can be treated under the guidance of a professional dentist, such as cleaning, bleaching and decoloration, crowns and so on. The phenomenon of transparent yellowing of teeth, it is recommended to go to the stomatology department of the regular hospital for examination to clarify the cause and then determine whether treatment is needed. Normally, you should pay attention to good dental care, and always brush your teeth at night to protect your oral and dental health.